TY  - BOOK
AU  - Houghton,Bernard  .
TI  - Online information retrieval systems : an introductory manual to principles and practice / 
SN  - 0851573630
U1  - 025.524 
PY  - 1986///
CY  - London : 
PB  - Clive Bingley , 
KW  - INFORMATION RETRIEVAL SYSTEM
N1  - Includes bibliographical references and index
ER  -